Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1758357AbZGGXqa (ORCPT ); Tue, 7 Jul 2009 19:46:30 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1756869AbZGGXqW (ORCPT ); Tue, 7 Jul 2009 19:46:22 -0400 Received: from nwd2mail11.analog.com ([137.71.25.57]:5237 "EHLO nwd2mail11.analog.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1757314AbZGGXqV (ORCPT ); Tue, 7 Jul 2009 19:46:21 -0400 X-IronPort-AV: E=Sophos;i="4.42,365,1243828800"; d="scan'208";a="3567805" From: Robin Getz Organization: Blackfin uClinux org To: "Ingo Molnar" Subject: Re: Boot Consoles question... Date: Tue, 7 Jul 2009 19:49:41 -0400 User-Agent: KMail/1.9.5 CC: "Andrew Morton" , linux-kernel@vger.kernel.org References: <200907040017.26921.rgetz@blackfin.uclinux.org> <20090704102904.GB32257@elte.hu> <200907041207.42388.rgetz@blackfin.uclinux.org> In-Reply-To: <200907041207.42388.rgetz@blackfin.uclinux.org> MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit Content-Disposition: inline Message-ID: <200907071949.41311.rgetz@blackfin.uclinux.org> X-OriginalArrivalTime: 07 Jul 2009 23:46:19.0880 (UTC) FILETIME=[207BDE80:01C9FF5D] Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1535 Lines: 43 On Sat 4 Jul 2009 12:07, Robin Getz pondered: > On Sat 4 Jul 2009 06:29, Ingo Molnar pondered: > > Could be changed i guess ... but is it really an issue? > > It is just a change from "normal" (when the kernel has no boot console). > > > One artifact > > could be manual scroll-back - it would perhaps be nice indeed to > > allow the scrollback to the top of the bootlog. > > Exactly. > > One of my thoughts (was since CON_PRINTBUFFER isn't used after > register_console()) - was for the CON_BOOT's CON_PRINTBUFFER flag to control > the clearing of the CON_PRINTBUFFER for the real console or not... > > All early_printk consoles that I looked at have their CON_PRINTBUFFER set. > > Which means that something like should do the trick -- allow people who want > to override things to do so, and still have the today's setup work as is... I guess no one liked that idea? How about at least making sure that the real console gets a message that something is on the bootconsole? Right now the switch message: console handover:boot [early_shadow0] -> real [ttyBF0] only is printed on the bootconsole, not on the real console - so someone looking at the real console may not know there is anything on the boot console. They just think that things are missing... -Robin -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/